Malicious PDF — malware analysis report

Static analysis result for SHA-256 386a9948fe346c8d…

MALICIOUS

PDF

142.5 KB Created: 2021-07-02 02:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2c70c252aa24680deb2fcc7a2a238bf6 SHA-1: 73cc8da2d3b9494742d132b5f210c1450041796e SHA-256: 386a9948fe346c8d618d8274a074830c9ccde5b73c72b902dc4403b912380867
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a shell, likely to execute a secondary payload. The document also features a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://sinhadventure.com/uploads/file/taxuripepotamowiwebup.pdf In PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/m9kg8998afe10g23lmqrcspt2n/musojamimunit.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/9ad6b3e60db2bdbd8bd6f769179285a8/58710215273.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/14823504212.pdfIn PDF document text
    • http://armanetti.com/images/73866793106.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbb5768f194---91306861095.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b5b8ae327---8799132667.pdfIn PDF document text
    • http://zae.me/datafiles/file/63867982171.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1bed957bc---26377345307.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/db74e18667c4dc2ab868d95d54f49301/bijusasado.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4aa4daf0ad23eb58177ead2a47123d82/9834918916.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/2417ef1fd43116391dd9d64a55d0fbf2/nuvikofew.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/51526570427.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/59081644703.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/o0r7kk5uj85cpa9hhln7gqolco/savezedififi.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/b90662c5335b7191eeff3b845dec0867/titibumefawelipad.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ce889b7dd1c---15346953448.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bae8862a72b---pigeripamufexares.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/7fbebea7dc9d0d7524c1b864aa4f52e9/jojaborulu.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16098aa34497ae---paropinepurekujekarub.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0980766e60---91649611738.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/064b65eeac1c8c522cb9656530542f8b/sasowatabigama.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5539c7434---ximezibigoze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=powerpoint+2007+the+missing+manualPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cac2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAC2 17952 bytes
SHA-256: 67978d253113afe38d5f93714a6ecc39e792b11ae3db3cb3121bb3dba6841b2b
font_01_sfnt_off0001fa04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA04 11176 bytes
SHA-256: c019cbd002503fffd9d5c1f18da989317f7962709ad47008f2ba1ead047e2726
font_02_sfnt_off00021420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21420 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1